Euphorbia cornigera (horned spurge) is a species of flowering plant in the family Euphorbiaceae, native to Bhutan. It is a rhizomatous herbaceous perennial growing to 75 cm (30 in) tall, rarely 1 m (3 ft 3 in), with narrow green leaves with a pale green spine. Acid yellow flowerheads (cyathia) are borne in summer.^[1]

It has gained the Royal Horticultural Society's Award of Garden Merit^[2]

All parts of the plant are highly toxic if ingested, and the sap may cause skin irritation.

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